www/gitlab: security and patch update to 17.1.6

Changes: https://about.gitlab.com/releases/2024/08/21/patch-release-gitlab-17-3-1-released/

Security: 49ef501c-62b6-11ef-bba5-2cf05da270f3
(cherry picked from commit c2317de94c5a3f76f65dfc741ee444c4af4c9249)